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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe6cc6574171647cc44f62b277ede7f26b6b30870a7a678d2772870f3dc82d66' 
  AND token = 'lHN4RhgysWtNpSaFik0Mr3mb1G/iHUiszo6O2xzZ0xA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}