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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bedcebe5926e90da274948f38cb10ce421883f403df6d0be43d1a1bc2cd49c62' 
  AND token = 'YQFIXXH8VdeImB7dwVzi1nN4fSgqJn/f49UgQLHII8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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