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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6895c05f0d45feaf90f7322b079dccdde044c5391b0b8af4765c06f462cca1af' 
  AND token = 'usypPVdbHU/q6kZXssxO9PdBFCURMQS27Rq9FvF6xfc=' 
  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"
    }
  }
}