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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5283a500f0e1c18bd2c948c86fefb23dc22b4e90772965d4af4fe67ed7e2c0f1' 
  AND token = 'vRZRHEfO/3i/iAy1SW0Cesh67IN6gf7KgZrDpO81npU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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