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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ae6babf794105e23f3fc253a2edd723d65d46af12a4e3fd2bb1fe8c3a7d2989' 
  AND token = 'BupY1yYgi7A46/+tNUxRh7mlyjicHoC+tpBxut7T7TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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