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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1db992bbd996b0ddb8aa3cb1b2e076d0066e514f655e5ca4cea96fc4fefa2d1b' 
  AND token = 'wixMlrsWZsw5JnFl5yyeEWQmpzkZcoYskrcLYLyieyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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