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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63ed93d5c8410a919cd3e91f334e7e4afa792808f1ab446d12a5491af538e9d1' 
  AND token = 'B6bfg0pst0b7D9w0Q/4CRo9d4sDLRe2foITCkkq1x80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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