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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '60030f1cab83b439a875d363c1db950d828164f32e135faf550d07178d2530e5' 
  AND token = 'j51r7Am77kOmbMnW0ZWLh6/hOYNpgJDYJ7rUfoNRFu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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