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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07bad97d4eb81bd2aedef1ed220427a334308ab9072da2e5a09c6c803f286265' 
  AND token = 'AvT5U7btBdyl3qXk8+ix4NKIdgu8+KotLNQSZvJQSoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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