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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4904352b2f9c83914e4b4ffb5dbb0111f8aa2841bb0804f10eb057a79808977d' 
  AND token = 'RqBgnqDYNB7EZp09TIvbEEjjrTetQ9PabY9vL3Mm05U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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