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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'eaa3d3cfd8d657717a02cb59e90aa0ec2ea6cb532f32e1f1df03374c436e0cf8' 
  AND token = 'g5p1Life67Oxpjb3QP56XDXWDshEI15rFoaBx9T47hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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