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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e25f58d40901c15ea0a0422fb7cc08005c9d3d1a73b338cda4a6a6ad07c6dc9f' 
  AND token = 'rQzJGeYaAGcAU6Dr3Jq9PbYVwVmM/KJGTECvO8EE2eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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