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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f14f5a07ff22f44c495a5593ff8f4ef663cdcedf0d4b4c54bb5362df45c035d5' 
  AND token = 'TnBmGltliLz7DwJUQa0m+/haZK/UpykKW6psW1N8fIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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