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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '153b4d889e5e0098abe96cb9581fbbeee026ae41fa9dc56314fafc17438e7805' 
  AND token = 'FfKoREk4CWehGmIQ331zvmQPizTTgh4dE+mAtTeXyHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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