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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c13c7b6985294a7104ed22f4a542f0a0ad78ef91a254f87f911e55d0d5853ff' 
  AND token = 'rd71B7yG+F2G71NgxaKgjnWlpyleRpm2veCXeTOrJYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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