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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '995670ac45cba3fcc8a2f89614d61b210672c1f8dc4362f7311e007820b0428c' 
  AND token = 'f2S2s1CdFW6hWv7a7uWMF2gF1cYPW8XlSv38SZ1mIXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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