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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46467f0aa7b19b78ff9c9f98caf956ad4e4451e2858e3f3ecc2a804700314b1a' 
  AND token = 'W98otXYzUaEsHCTzIcSev1d0T5a0QDzDn/L+hTJJg4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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