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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a6c9413b219cb5c1bbdb991df2b2e3176d94e29a177d10e053abf60ec0bddab' 
  AND token = 'PX5Yk4AwqFVNzxVdzR/CFlpKG/YPJa5ue9Wk8a3pmDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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