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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '119489ed1e02e04644dcaa54b6742ae572a27af992b0e109a50abdb544d184ef' 
  AND token = 're+hNWpGPYRcAyuOQpNCmddO9cnI1VdOO9CZr+EzO+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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