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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50180a19f22b3a08ead08398d24a9e74e0a79407f3a67961356b02b292fbe687' 
  AND token = 'KG1BKft021vc5o4Uy8EVh9VLcdAtddl4yrp7Gf2y0lA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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