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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8522620734e27df121e0d51100c5de7bff093cfb2f7d7b9df833053a62165e79' 
  AND token = 'srRoeTKMd8lN8z4Y+FvVam+YUAPYvEdVvOKKxLQ4dHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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