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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60709334c68080feaa7ced1a81b84b70f018d8dc3e97bb63d3cf117cd9833756' 
  AND token = '5j/GljN7oUEWqRRyCu2mByF8+O1F2RI0ajq129FRtRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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