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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b988630b9cfcad4b70421b257a6b7edc0d1259a9743a4fe8bf7d896da59dbc15' 
  AND token = '63VOfzZLak+U/2n09gnbdLii7630McVmICQL3ffjiaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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