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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3f845982d9fcf9e9eb9e271322892bdd2577724837d537069339f79ccb006b9e' 
  AND token = 'ZMzkVoH8l12XOaZS93Nb3A8HDmWwqATYFjhq1Pmyn6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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