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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd864586e1a1efe6345128fe0c7126ee1057840cef4dc3918c1aec26a55d39d14' 
  AND token = 'DxevL55BvFUDT6wlW+X2J+hsq/LNaJaZaoZ/1A1FM0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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