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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '012b3a9bc625a427ca7fa58959285ed933bce55ec327a321888fb7cd58a4857b' 
  AND token = 'ARoJ8Nd+otneEOPtMF0SGOm5NBou+zvv4DdJw9Z4Tu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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