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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cce8ade40adebb660091ae6d5a8a358b63fcebcdfe6ff06a9110931024871c23' 
  AND token = 'FCusBWo3W8FScLBcbCX/GNqhsrL3Uf7ay32ViaVNA54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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