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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'bb6410efc12df7012291e487109656bdaef475799636f3c78cb37cf8ad489bb4' 
  AND token = 'I0KJ976UfMIaBS3t6PyItKq55oQcAgL8l6ElU+sYrTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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