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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b2d9e079b9ef95dc1dfb54e24d4d13148ef1897cb680300618f225c5daee009' 
  AND token = 'SODt+FaKRs92/k3Kfb0ZH+XlA3RYi1rQwB/FGYnBmHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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