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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f068cf2ad318e3a383950d931178a0d5509b013db9445321d61809a1d713136' 
  AND token = 'ryKYEvhhK4VBBKuD4mKZhEIIYPLK63KtjsHIk24SDi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00130

JSON explain

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