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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5aee0d4355b8df78a371f267589a0a82980415e0d24d521010b0eea1a9717378' 
  AND token = 'Nw4JfXUhA0bFQc0sZz+phYQvBywoLuYfLNe3AuustVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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