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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b8c3d1ffdf772679ff5f39b1057df3bfe7c37dce5bb319989fd02b0907c6b93' 
  AND token = 'gdq4yvfnQLl3f2y4NMSYAMUxmhIiZ2sGOqitmHasWIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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