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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e043ca9fae8aef040db6f54b991ae296321856ca6cdee174a444b6c568338a0' 
  AND token = '3HIMOcivujJjgOk5G8rNZ700suoh0vHszP3IiCdTvsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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