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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24bdb3c4a11378a5966fc3215d3259317ce0e98f710b56159b1df1fa6caec7e5' 
  AND token = 'eAdix0+mT0Eu687Z8hgDULb3LhGcwZ9N8PGfZCHZXa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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