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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '075dfca7440235b1c6d4bd21cf81d7c6ff7d018f516f615346cdd21f11e647de' 
  AND token = 'lfC+xNbJ0iSpVbqb4qx5atBz3Q24gNO3SOB09LsdyGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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