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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '080cee17097c7e0580f732986f73ec0d28baf854e80c73cd4c0204cec7186ac1' 
  AND token = 'h6rLgRil/EAAbsNpCSdhs8OcP0Qyk0on/Ixzqc4Pj7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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