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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0412341c8a7c8d594728d09306d797798a701ade2b8114ecd185586e22973de' 
  AND token = 'G2W9Qgknhy06OD569/D8Dri3L0j466xBJDsFcykuN28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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