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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2246d7563c124f5680596edbad77961270296bedcc4ee51512cc3d5375e1c551' 
  AND token = 'ZHl1W9MSM68iP7eqBGVSYgoghZ+C/b7/t89FLhYGYQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}