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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '922a4165cc68afca81240204d444cfa72a8840f8a6ae1bfbd5b1ee862c896e2e' 
  AND token = 'zALyoM+k8E9d0529q7+tOMoW9tQpsyq9F/otQgcYpMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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