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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e7db77dc7de558cf2ab9cf519f651361eb301e778efd619c229e70b633c4ea7' 
  AND token = 'ABCkqxjD9Oj/FUAz/qOfuvLXOTopxWX1LQzD7BkzrIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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