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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '058482c48f13cd4c3389be9a6b975d414fa614342587219d436b3bd16968dde9' 
  AND token = 'hZlM/hETphidsbfan16a7TaNOL4HvocnMYYBl6V0y64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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