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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '146b3848f8c290cfc10b1800e2d3d340c44db09d637d256168b88ef77f2dad48' 
  AND token = 'EG+ZyQaD3xQzx/7Cr+nwigRVmPr9m5te2V+UnFJ3/8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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