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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbd2f5b9e25eb311bfdd7d75f11b823d1cb9b7030e91a455506e3cd60d8a2068' 
  AND token = 'pBU07AgsbT/Hliz/DVNVNfECjW2R0v77OiedYXA/cyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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