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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '810568764b6e0bc58a720985635565ecae44dcb8b25d1d35d36541dc31db7797' 
  AND token = 'fp+HmbcYcMXfg1clX5VUKEmi3rJ8t6cPiMuiUmpUzl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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