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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca7b12ebe622aabbc77bd23e4eeff633365e249cd16ef05d62e1e01f5584349c' 
  AND token = 'pT7F60u1f1WHeaZhzCoSITMbZecc/RdxGDRfEqPfQrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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