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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2224322d61d7ecc1c5e9264dd88e889dc504fd3d888c98511b2ebb105dd56555' 
  AND token = 'tYri6brzlbpXUae4k1yufhjIld0kDXk2XeNuhMA0Dsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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