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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7619ca5a3d6ebfd8f16a0d361d5c386a2df5b2999dcd5c31b9480019930fac0' 
  AND token = '08Slfol65HyH3xWknwPtDu5OC5GZh+YuQJrVE8JLPWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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