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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5f96d5c11e431ee67700474da0ad578573e55ae075abc5917888028f50b8781' 
  AND token = 'NGo8sOh13cLevuCsQenWXGiOqhWJ4w5p5G0/u7rhSMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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