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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9a0d3c546e732bbca12216c71a8aee0ba71d9d448b2e3f318f79d9acb0335ae' 
  AND token = 'j8yy96+DBVt4IXw82+8RFsMFgmlJb8LaoNaM/DCflJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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