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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33c4a6e410ee3bc10b5b4a43aaacb136977817728143df08ba356d61ba0736fa' 
  AND token = 'Oa5Ti3YrD2RuflMJlpNFGVChT58rfEiLl1INJxGXVuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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