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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea2aba5acd288029fee95d31f361f374a3832e29fefa44085565e9e0d960235d' 
  AND token = 'UG+U7qo1q4n9E5ixugaIGQWL60mjZ6NTGtbxuyzsAuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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