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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f605a0fd06c37bd958984cdf9b5cbf0a5f5161c45ecfa9cdd1edcb91bb6f957' 
  AND token = 'iP0B84eukT9AcQP5u8xAmwQmGgYGcbgUhoSuZyHEEQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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