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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee096c64df7cfb4f0b70e0e84f357a5ec84ad5298cde5ed6cd0a422cd0dd384' 
  AND token = 'O781o+5mV08lY+T7miA6gvvEciD84oa2RnOL7/DgA3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00085

JSON explain

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