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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '106d4c593b91449c3760c1652f3ab5758764db3672db7661da7ebc3cbd80f2c1' 
  AND token = 'KtTZ15hc+HXWFr2zHOXDi56gUWGd44Qu0Q0UddetBSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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