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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd49518acf43c601a77b0aa5bd7684564eab8be9754f83514a24d54f96482ec95' 
  AND token = 'SoX/8OPVoO0cPTliWWdPzwCBRjTdefgTHo7Fx0zdmq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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