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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '365ad1daf7fcd775bbb29b3653b6b00cfce6f8bcc4a41d67e6c63e48d2f07b6d' 
  AND token = 'SHAX7eRsd3nXTdCT4oe3Ie1YaX3ZPwRR5uaFoeGxowo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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