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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deb91a10ddafa05993a0a14dd936259ede2429da6e21d8cb93d134e282cf4285' 
  AND token = 'KDyhNg5e9nEnm/qVHy+w49s9s8Na0EUW2W5p65XiU/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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