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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '220546b3d9b32a70fa5cc657f23beacb111f283fcb91b7add93b01a95d1a8f6e' 
  AND token = 'R2j8tCB/qk/EEnxdhA16J12Q/wEsCmK+VPVQbfBcuUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}