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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4008f9ece74e6a3b55892dc64e7f2bfc9caa5f0583dd3d9057f724323a2fabbc' 
  AND token = '+d+oR43/aRnuEnfI++oCh85dn2qAQHDS2wH8Boyttss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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