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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faaa5737e2b8addc31f0c5d7ca56ce8eefee8f35d812ff5adf1e262ddfa677c1' 
  AND token = 'VNvAhFzSctnkMUo5sKTne21eWU0m1DBTnvA9RNi0m2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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