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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1116fa4d1c615a944b5d0ab7368979f4a57c582de3f14bbb57868debc2c1057' 
  AND token = '+Vr9Y/fExlgI5/cUvR0L/bai6nX01lldhyVyKdyHJYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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